用SelectSingleNode()和SelectNodes()搜索结点

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            XmlDocument doc = new XmlDocument();//建立文档对象
            try
            {
                doc.Load("http://www.cnblogs.com/myOrder.xml");
                XmlNode root = doc.DocumentElement;//获取文档的根节点
                XmlNode temp;
                temp = root.SelectSingleNode("姓名");
                Console.WriteLine("(查找1)" + temp);
                temp = root.SelectSingleNode("定购人信息/姓名");
                Console.WriteLine("(查找2)" + temp.Name+":"+temp.InnerText);
                temp = root.SelectSingleNode("订货信息/商品/品名");
                Console.WriteLine("(查找3)" + temp.Name + ":" + temp.InnerText);
                XmlNodeList templist = root.SelectNodes("订货信息/商品/品名");
                Console.WriteLine("(查找4)");
                foreach (XmlNode nodeinlist in templist)
                {
                    Console.WriteLine(nodeinlist.Name + ":" + nodeinlist.InnerText);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            Console.ReadLine();//辅助代码，用于保留控制台窗口
        }
    }
}